Home / 15,479.05-21,371.88-13,672.75

Finding the Fourth Proportional to 15,479.05, 21,371.88 and 13,672.75

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Solution

The fourth proportional to 15,479.05, 21,371.88 and 13,672.75 is: 18,877.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.05 : 21,371.88 = 13,672.75 : x
  2. Step 2: Convert to fraction form
    15,479.05/21,371.88 = 13,672.75/x
  3. Step 3: Cross multiply
    15,479.05x = 21,371.88 × 13,672.75
  4. Step 4: Simplify right side
    15,479.05x = 292,212,372.27
  5. Step 5: Solve for x
    x = 292,212,372.27/15,479.05
  6. Step 6: Final answer
    x = 18,877.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.